Glass for laser processing and method for producing perforated glass using same

• Main Authors: Koyo, Hirotaka, Inoue, Teruhide, Sakaguchi, Koichi
• Format: Patent
• Language: English
• Published: 25.06.2019
• Subjects: CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS; CHEMISTRY; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; GLASS; JOINING GLASS TO GLASS OR OTHER MATERIALS; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; MINERAL OR SLAG WOOL; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS; SURFACE TREATMENT OF GLASS; TRANSPORTING; WELDING; WORKING BY LASER BEAM

The present invention provides a glass composition that allows holes with a circular contour and a smooth inner wall to be formed by a collective micro-hole-forming process using a combination of modified portion formation by ultraviolet laser irradiation and etching, the glass composition being adapted for practical continuous production. The present invention relates to a glass for laser processing, the glass having a glass composition including, in mol %: 45.0%≤SiO2≤70.0%; 2.0%≤B2O3≤20.0%; 3.0%≤Al2O3≤20.0%; 0.1%≤CuO≤2.0%; 0%≤TiO2≤15.0%; and 0%≤ZnO≤9.0%, wherein a relationship of 0≤Li2O+Na2O+K2O<2.0% is satisfied.